Improvement in devices for supplying steam to boiler-furnaces



C'. G. SCHLOTT'ER'BE'CK & `C. F. KNEISLY. DEVICE EOE SUPPLYING STEAM `ToEOILER FURNACES.

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ILPEERS. FHOTO-LITNQGRAPHEM WASHINGTON. Dv C.

PATENT CHRISTIAN e. SOHLOTTERBEOK AND CHRISTIAN F. KNEISLY, OF DAYTON,

- i OHIO. ,y

|MPRovrMrNI |N D'Evlcrs FOR SUPPLYING STEAM IorolLrReFuRN/icrs.

. Specification forming part'of Letters Patent No. 173,501, datedFebruary 15, 1876-, application filed August 12, 1875. a

To all whom -it may concern Be it known that We, CHRISTIAN Gr. SCHLQT-TRBECK and CHRISTIAN F. KNEISLY, of Dayton, in the county of Montgomeryand State of Ohio, have invented certain new and useful Improvements inBoiler-Furnaces; and we do hereby declare .that Vthe following is afull, clear, and exact description thereof', which will enable othersskilled in the art to which it pertains to make and use the same,reference heilig had to the accompanying drawings, and to the letters ofreference marked thereon, which form a part of this specification.

Figure l is a longitudinal vertical section of a boiler and furnace,with improvement attached,'on line :v au Of Fig. 3. Fig. 2 is atransverse vertical section on y g/,ofFig l. Fig. 3 is a horizontalsection on line z z of Fig. 1.

A represents anyordinary boiler-shell. vB is the tire-box; (l C, finesin the boiler. D is the bridge wall; E, grate-bars.

This inventionl relates to devices for promoting the combustion of fuelin the furnaces of steam-generators, by causing a more perfeetcombustion of the gases generated therein;and ,it consists in thecombination and arrangement of certain pipes for 'conducting steam fromthe generator to its furnace for the accomplishment of the purposesnamed,

' as will be more fully described hereinafter.

It is a well-known fact that in the burning of fuel in the furnaces ofsteam-generators in the usual manner, and when only what is termed a'natural draft is used, there is a great loss consequent upon the escapetherebut which consists, in part, atleast, of unconsumed gases, which,if properly mixed with air or oxygen in the requisite quantities beforeleaving the furnace,`would be consumed, and thusbe made to produce largeeconomy in the consumption Of fuel. l 1

The combination Vand arrangement of the parts composing this improvementare designed to produce the results-'above named; and to accomplish thiswe provide a series of pipes, a, made, preferably, of cast-iron, andwhich extend across the sides and-rear of the furnace and below thegrates. The reason'for thus locating said pipes being, first, theplacing'them in a position where they will not be destroyed by theintense heat generated in the furnace, and, second, placing them wherethey will receive a portion of the heat radiated from the fuel upon thegrate, and thus admit ofthe steam which passes through them beingsuperheated to some extent.

It will be seen by referring to Fig. 1 of the drawing, that the pipe cf,which passes across the rear of thefurnace, is inside of the bridgewall, and that the pipe a extends beyond it and into the hollow bridgewall. YVithin the space in said wall there rise two vertical pipes, a a,which extend upward sufficiently high to cause the rightangle outlets,which are placed upon their upperends, to be above the fuel upon thegrates. The outlets of these rightangled portions have verticallyelongated apertures, through which the steam passes, and is directed to`the center of the furnace.

1n the two front corners of the furnace there are placed vertical pipesa, similar to those described, except that their outlets are elongatedhorizontally, and are so placed that the steam issuing from them is alsodirected to the thus protected from the intense heat of thecentral andupper portions thereof.

Another important advantage arising from this arrangement is that thegases generated linthese remote portions'of the furnace are forced bythe issuing steam to the center thereof, and are made to pass over theincandescent portion of thefuel, as a consequence of which they areignited, and caused to aid in the generation of steam, instead ofpassing Oif in an unburned condition and thus wasted, as'

is the case in furnaces constructed without our Improvements.

We have shown our improvements as applied to an ordinary furnace, and toa two-flue boiler; but they are equally' applicable to that ners becaused to ascend within the furnace instead of Within the bridge wall.

In the present case, A represents a cylindrical boiler, having twodiues,C C, passing through it; B the furnace, in which the fuel is burned, andinto which the steam is injected, and E the grates. l

One of the most important features of our invention consists in the factthat the discharge orifices of the steam-pipes are elongated, and theirlargest diameters placed in opposite directions, as a consequence ofwhich the jets are made to act upon a much greater area of the surfaceof the lire-box, and to come in contact with a much larger portion ofthe gases contained therein.

The steam used in these pipes may be admitted at any convenient point byproviding the place with a suitable connection -to which to attach it. t

Having thus described our invention, what we claim, and desire to secureby Letters Patent. is-

Vertical pipes arranged in the corners of a furnace, and havingelongated discharge-orices, two of which are vertical and twohorizontal, in combination with supply-pipes, arranged under thegrate-bars of a furnace, substantially as and for the purpose set forth.

In testimony that We claim the foregoing as our own invention, we ax oursignatures in presence of two witnesses.

'CHRISTIAN G. SCHLOTTERBECK. CHRISTIAN F. KNEISLY. Witnesses:

GEO. M. YOUNG, E. S. YOUNG.

